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function onTick(){
console.log(graph)
let positions = pointsGeometry.attributes.position.array
for(let i = 0;i< positions.length;i+=3){
positions[i] = nodes[i/3].x/100
positions[i+1] = nodes[i/3].y/100
positions[i+2] = 0
}
pointsGeometry.attributes.position.needsUpdate = true
linePositions = lineGeometry.attributes.position.array
graph.links.forEach((l,idx)=>{
let startNode = l.source
let endNode = l.target
linePositions[idx *6] = startNode.x/100;
linePositions[idx *6 +1] = startNode.y/100;
linePositions[idx * 6+2] = 0;
linePositions[idx *6 + 3] = endNode.x/100;
linePositions[idx *6+ 4] = endNode.y/100;
linePositions[idx *6+ 5] = 0;
})
lineGeometry.attributes.position.needsUpdate = true
}
function onRun(){
nodes = graph.nodes
links = graph.links
simulation = d3.forceSimulation(nodes)
.force("charge", d3.forceManyBody())
.force("link", d3.forceLink(links).strength(0.05))
// .force("center", d3.forceCenter())
.force("tick", onTick);
simulation.restart()
}
function lineCloud(graph){
let points = [];
let nodes = graph.nodes;
let links = graph.links.forEach((link) => {
let startNode = nodes.find((n) => n.id == link.sourceId);
let endNode = nodes.find((n) => n.id == link.targetId);
points.push(startNode.position);
points.push(endNode.position);
});
lineGeometry = new THREE.BufferGeometry().setFromPoints(points);
const material = new THREE.LineBasicMaterial({ color: "#3498db" });
let lines = new THREE.LineSegments(lineGeometry, material);
return lines;
}
function pointCloud(graph)
{
pointsGeometry = new THREE.BufferGeometry();
let points = [];
graph.nodes.forEach((n) => {
let vertex = n.position;
points.push(vertex);
});
pointsGeometry.setFromPoints(points);
// let pointsMaterial = new THREE.PointsMaterial({
// size: 8,
// sizeAttenuation: false,
// color: "#92F22A",
// map: circle_sprite_aa,
// transparent: true,
// alphaTest: 0.5
// });
let pointsMaterial = new THREE.ShaderMaterial({
vertexShader: nodeVertextShader,
fragmentShader: nodeFragmentShader,
transparent: true,
alphaTest: 0.1
});
return new THREE.Points(pointsGeometry, pointsMaterial);
}
function parseGraph(data) {
var id = 0;
var nodes = [];
var links = [];
function traval(root, children) {
if (!children) {
return;
}
let node = {
id: id,
property: {
name: root.name
}
};
node.position = new THREE.Vector3(
Math.random() * 5 * 2 - 5,
Math.random() * 5 * 2 - 5,
Math.random() * 5 * 2 - 5
);
nodes.push(node);
let neibours = root.children
.map((c) => {
id++;
let n = {
id: id,
name: c.name
};
n.position = new THREE.Vector3(
Math.random() * 5 * 2 - 5,
Math.random() * 5 * 2 - 5,
Math.random() * 5 * 2 - 5
);
return {
node: n,
children: c.children
};
})
.forEach((c) => {
nodes.push(c.node);
let link = {
id: node.id + "-" + c.node.id,
source: node,
target: c.node,
sourceId: node.id,
targetId: c.node.id
};
links.push(link);
traval(c, c.children);
});
}
traval(data, data.children);
return {
nodes,
links
};
}
var url = window.parent.dataUrl
var data = fetch(url).then(d=>d.json()).then(d=>{
graph = parseGraph(d)
nodeCloud = pointCloud(graph)
edgeCloud = lineCloud(graph)
scene.add(nodeCloud);
scene.add(edgeCloud);
})
var nodeVertextShader = `
precision highp float;
void main() {
vec3 finalPosition = position;
vec4 mvPosition = modelViewMatrix * vec4( finalPosition, 1.0 );
float vSize = 3.0 * ( 50.0 / -mvPosition.z );
gl_PointSize = vSize;
gl_Position = projectionMatrix * mvPosition;
}
`
var nodeFragmentShader = `
void antiAlia(){
// anti-aliased support
float len = length(gl_PointCoord- vec2(0.5, 0.5));
float delta = 0.0, alpha = 1.0;
delta = fwidth(len);
alpha = smoothstep(.495-delta, 0.495 + delta, len);
vec4 bColor = vec4(0.0);
gl_FragColor = mix(gl_FragColor, bColor, alpha);
gl_FragColor = gl_FragColor * (1.0 - alpha);
}
void renderCircle(vec4 color){
float r = length(gl_PointCoord- vec2(0.5, 0.5)), delta = 0.0, alpha = 1.0;
if (r > .5) {
discard;
}
gl_FragColor = color;
}
void main() {
vec4 color = vec4(231.0/255.0, 76.0/255.0, 60.0/255.0,1.0);
float len = length(gl_PointCoord- vec2(0.5, 0.5));
renderCircle(color);
antiAlia();
}
`
var scene = new THREE.Scene();
// Create a basic perspective camera
var camera = new THREE.PerspectiveCamera( 75, window.innerWidth/window.innerHeight, 0.1, 1000 );
camera.position.z = 4;
// Create a renderer with Antialiasing
var renderer = new THREE.WebGLRenderer({antialias:true});
// Configure renderer clear color
renderer.setClearColor("#000000");
const controls = new THREE.OrbitControls( camera, renderer.domElement );
// Configure renderer size
let width = d3.select("#three-canvas").node().getBoundingClientRect().width
let height = 400;
renderer.setSize(width,height);
// Append Renderer to DOM
let canvas = document.getElementById("three-canvas")
canvas.appendChild( renderer.domElement );
// Render Loop
var render = function () {
requestAnimationFrame( render );
controls.update()
// Render the scene
renderer.render(scene, camera);
};
render();
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